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7227c89847
This PR places all LMMS symbols into namespaces to eliminate any potential future name collisions between LMMS and third-party modules.
Also, this PR changes back `LmmsCore` to `Engine`, reverting c519921306 .
Co-authored-by: allejok96 <allejok96@gmail.com>
98 lines
1.8 KiB
C++
98 lines
1.8 KiB
C++
/*
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* FifoBuffer.h - FIFO fixed-size buffer
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*
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* Copyright (c) 2007 Javier Serrano Polo <jasp00/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef FIFO_BUFFER_H
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#define FIFO_BUFFER_H
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#include <QSemaphore>
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namespace lmms
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{
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template<typename T>
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class FifoBuffer
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{
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public:
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FifoBuffer(int size) :
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m_readSem(size),
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m_writeSem(size),
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m_readIndex(0),
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m_writeIndex(0),
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m_size(size)
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{
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m_buffer = new T[size];
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m_readSem.acquire(size);
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}
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~FifoBuffer()
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{
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delete[] m_buffer;
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m_readSem.release(m_size);
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}
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void write(T element)
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{
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m_writeSem.acquire();
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m_buffer[m_writeIndex++] = element;
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m_writeIndex %= m_size;
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m_readSem.release();
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}
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T read()
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{
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m_readSem.acquire();
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T element = m_buffer[m_readIndex++];
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m_readIndex %= m_size;
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m_writeSem.release();
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return element;
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}
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void waitUntilRead()
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{
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m_writeSem.acquire(m_size);
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m_writeSem.release(m_size);
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}
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bool available()
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{
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return m_readSem.available();
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}
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private:
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QSemaphore m_readSem;
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QSemaphore m_writeSem;
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int m_readIndex;
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int m_writeIndex;
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int m_size;
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T * m_buffer;
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} ;
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} // namespace lmms
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#endif
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